﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal interface IAsyncDataSourceEnumerator : IAsyncEnumerator<DataPath>, IDataSourceEnumerator
  {
    IMoveAndFetchAsyncResult BeginMoveAndFetch( bool approximateMove, long expectedMoveCount, int expectedFetchCount, AsyncCallback userCallback, object asyncState );
    MoveAndFetchResult<DataPath> EndMoveAndFetch( IMoveAndFetchAsyncResult moveAndFetchAsyncResult );

    IAsyncResult BeginFetchGroup(
      DataPath groupPath,
      GroupTarget groupTarget,
      int expectedFetchCount,
      AsyncCallback userCallback,
      object asyncState );

    GroupFetchResult EndFetchGroup( IAsyncResult asyncResult );

    IAsyncResult BeginReset( AsyncCallback userCallback, object asyncState );
    ResetResult EndReset( IAsyncResult resetAsyncResult );
  }
}
